Electrophysiological measurements of spectral sensitivities: a review

Brazilian Journal of Medical and Biological Research

R.d. Devoe¹  J.m. De-souza¹  D.f. Ventura¹ 

关键词: Spectral sensitivity;    Color vision;    Electrophysiology;    Experimental automation;   

DOI  :  10.1590/S0100-879X1997000200003

来源: SciELO

【 摘 要 】

Spectral sensitivities of visual systems are specified as the reciprocals of the intensities of light (quantum fluxes) needed at each wavelength to elicit the same criterion amplitude of responses. This review primarily considers the methods that have been developed for electrophysiological determinations of criterion amplitudes of slow-wave responses from single retinal cells. Traditional flash methods can require tedious dark adaptations and may yield erroneous spectral sensitivity curves which are not seen in such modifications as ramp methods. Linear response methods involve interferometry, while constant response methods involve manual or automatic adjustments of continuous illumination to keep response amplitudes constant during spectral scans. In DC or AC computerized constant response methods, feedback to determine intensities at each wavelength is derived from the response amplitudes themselves. Although all but traditional flash methods have greater or lesser abilities to provide on-line determinations of spectral sensitivities, computerized constant response methods are the most satisfactory due to flexibility, speed and maintenance of a constant adaptation level

【 授权许可】

CC BY   
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